Xanthin

{zanf -thin) [Eavdbg, yellow], C5H4- N402. A leukoma in found in nearly all the ti ues and liquids of the animal economy, and also in many plants; it occurs in minute quantities in urine, also in guano. It is formed in the decomposition of nuclein by dilute acids. It is a colorle powder, almost insoluble in cold water, but readily soluble in dilute acids and alkalies, and acts as a muscle-stimulant, especially to the heart. 666